$color:#2792e4;
header{
    width: 100%;
    height: 44px;
    line-height: 44px;
    background: #2792e4;
    color: #fff;
    box-shadow: 0 0 1px 2px rgba(0, 0, 0, .1);
    h1 {
    text-align: center;
    font-size: 20px;
    line-height: 44px;
    font-weight: 400;
    }
    a{
        position: absolute;
        top: 0;
        left: 5px;
    }
    a.return_btn {
    width: 44px;
    height: 44px;
    background: url(../../images/bjhf/return_btn.png) no-repeat center center;
    background-size: 24px 24px;
    display: inline-block;
    }
}

.header-fixed{
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}


